For new designs see also module-power12-and-5

Module pins:

IN_VIGN pin:

1) Simple vehicle wiring: rusEFI does not control main relay.

In this case, IN_VIGN pin can be wired to any +12V voltage source used to power the ECU (i.e. V12_RAW).

2) Advanced vehicle wiring: rusEFI controls main relay.

IN_VIGN should be wired to ignition source, not main relay output. This voltage should be controlled by the ignition switch key, meaning 0V when switched OFF, and the battery voltage for the switched ON key.

VIGN is divider output for MCU module.